Timing mechanism



TIMING MECHANISM Filed July 25, 1927 2 Sheets-Sheet 1 M2 ar- IN VEN TORR. D. SMITH TIMING MECHANISM July 3, 1934.

Filed July 26, 1927 2 Sheets-Sheet 2 Patented July 3, 1934 UNITED STATESPATENT OFFICE 24 Claims.

This invention relates to the provision of winding gear separate fromtime setting controls in the general type of timing mechanism disclosedin my co-pending application Serial No. 616,549, filed February 2, 1923useful for effecting the hand controlled and time governed automaticaction of an electric switch, gas valve, or any other kind of devicewhatever to which the present improvements may have application. 1

This invention further relates to the provision of drive gear in theclass of mechanism above referred to whereby the time setting dial maybe impellable by the running of the time movement so'as to indicate thetrue time of day at all times as well as the time of day at which thetimer has been set to perform its automatic function.

Other objects and illustrative constructions will hereinafter be pointedout in greater detail, the following description having reference to theaccompanying drawings wherein:

Fig. 1 is a front outside view of the winding and time setting controls.

Fig. 2 is a view partly in section on the plane 2--2 looking in thedirection of the arrows in Fig. 1; there being shown only the timingmechanism and not the electric switch, gas valve orother useful agent tobe controlled thereby.

Fig. 3 is a view taken in section on the plane 3-3 in Fig. 2 looking inthe direction of the arrows. I

Fig. 4 is a fragmentary .view looking in the direction of arrow 4 inFig. 3.

Fig. 5 is a view taken in section on the plane 5-5 in Fig. 2 looking inthe direction of the arrows.

Fig. 6 is a View similar to Fig. 1 showing drive' gear for the timedial.

Fig. '7 is an outside view looking at the right of Fig. 6the casingbeing partially broken away to show details of the time dial gearingpartly in section on the plane 7-- -7 in Fig. 6.

Fig. 8 shows in enlarged detail a practical construction for themounting of the time dial to be impelled with the running of the timemovement.

Fig. 9 shows a modified form of time dial with the addition of drivegear'to impel the time dial for indicating the correct time of day atall times as well as the times of day for which the pointers are set tocause automatic actions.

Fig. 10 is a plan view looking downwardly on Fig. 9 the casing andcertain details of the drive gear being shown in section on the plane1010 in Fig. 9.

Fig. 11 is a partial sectional view taken on the plane 1111 in Fig. 9looking in the direction of the arrows and showing more clearly certainstops limiting the relative movement of spindle 17', combined gear andratchet wheel rotor 37'--40', and manuals 39' and 4'7 to the purpose ofinsuring that the power spring 25' shall be sufiiciently energized toreturn the said manuals to zero position whenever displaced therefromfor effecting time settings.

As the present improvements are confined to timing mechanism quiteindependent of the device to be timed thereby I have omitted the showingof any such device in the drawings but reference may be had'to my U. S.Patent No. (Re issue) 15,044 granted Aug. 26, 1930 and to my copendingapplication Serial No. 616,549 filed Feb. 1923 for examples of gasvalves, electric switches, and the like adapted for uni-directional orreciprocative, single or plural automatic actions timed by the rotationof cams or the like through the instrumentality of pivoted membersrepresented in the present disclosure by the front detent 10 and therear detent 11 which may or may not have the common pivot 12 and whichmay coact in'any desired manner respectively with the front cam 13 andrear cam 14 to control the actions of a device not shown under theseparate and individual operative effect of said two cams respectively.

The present improvements are concerned with the means for propelling andpredetermining the time at which cam 13 shall act upon detent 10 and theselectively separate and different time at which cam 14 shall act upondetent 11.

The system of rotative parts including cams 13 and 14 includes the mainwinding arbor 15 of any suitable time movement between the movementplates 16 and 17 mounted in any suitable manner upon the frame plate 18rigid with the front frame plate 19 and rear frame plate 20 which as awhole are enclosed in a housing 21.

Main spring 25 of the movement may connect at its inner end to windingarbor 15 and at its outer end to a frame post, not shown, in a manner topropel arbor 15 in a clockwise direction in Figs. 1, 3 and 5. The powerof spring 25 is held back by the action of any suitable retarding trainin mesh with the large gear 26 carrying the pawl 27 adapted to engageratchet wheel 28 which ratchet wheel in some movement constructions isfast to the winding arbor 15, and in other movement constructions isgiven a frictional mounting upon arbor 15 through the axial actingthrust of spring 29 backed up by the adjustable nut 30 and actingthrough the medium of a washer 31 to press ratchet wheel 28 and the hubthereof against the shoulder 32 on arbor 15; the strength of thisfrictional mounting being such that main spring 25 cannot turn arbor 15when ratchet wheel 28 is held from turningby pawl 27 on the retardinggear 26 but the strength of said frictional mounting is such that arbor15 may be turned by crank 33 with sufiicient force to overcome thisfrictional resistance. An example of this type of construction is old inthe art as evidenced by U. S. patent to Gibney No. 1,150,514. I haveshown crank 33 rigidly secured to the forward end of arbor 15 byproviding a hole in said end of the arbor into which crank 33 may snuglyfit and be retained by a set screw 34 projecting through a collar 35 andthrough arbor 15 to bear upon a spot in crank 33 and for which may besubstituted of course, a tapered pin or any other preferably removablemeans of fastening. For instance, crank 33 may be threaded at itsmounting end internally or externally to screw onto arbor 15.

Arbor 15 carries keyed thereto by a tongue on lock collar 36 the pinion37 a cut out 24 in frame plate 18 accommodating same.

Between pinion 37 and collar 35 there is loosely pivoted on arbor 15 ahub 38 fiatted at its forward end to carry in fixed rotative relationthe time pointer 39 and carrying as an integral rotor fixedly mounted onits rear end the cam 14 flanked on its front face by the ratchet wheel40 and on its rear face by the gear 41 all solidly assembled by rivets42 or in any other suitable manner. Hub 38 and its carried parts asabove described are rotated preferably, but not necessarily, in reducedspeed ratio to pinion 37 through the idler or back-gears pivoted inunison by stud 43 upon movement plate 16 and comprising gear 44 in meshwith pinion 3'7 and gear 45 in mesh with gear 41.

Loosely rotatable on hub 38 between ratchet wheel 40 and time pointer 39is a larger hub 46 given a bearing in the frame plate 19 and carrying atits fiatted forward end in fixed rotative relation the time pointer 47having the upstanding ear 48 and said hub 46 carries rigidly mounted atits rear end the trip dog 49 shown most plainly in Fig. 3. I

Also loosely mounted upon hub 38 between hub 46 and ratchet wheel 40 iscam 13 having an opening 50 for the tongue 51 on trip dog 49 and havinga circular opening 52 through which protrudes the end 53 of a springpawl 54 mounted on gear 13 rigidly at 55 in such position that pawl 54tends to seat itself in the teeth of ratchet wheel 40 whereby cam 13 ispositively'propelled in a clockwise direction in Fig. 3 so long as pawl54 is permitted so to sea The slight movement of tongue 51 in opening 50permits pawl 54 to be lifted out of engagement with the ratchet teeththrough the small increment of movement of trip dog 49 relative to cam13 thus permitted, trip dog 49 being inefi'ective to disengage pawl 54from,

ratchet wheel 40 unless purposely moved to the left in Fig. 3 or unlessimpeded in its clockwise travel as impelled by the rotation of cam 13 bythe time movement because of the spring tension in pawl 54.

A time dial 56 is rotatably mounted by means of an eyelet 5'7 clampingsaid dial against the front face of the housing through the medium of afriction washer 58 which eyelet affords an opening for the rotatableparts hereinbefore described and may if desired be of such internaldiameter as to afford a bearing for all these parts by proper fit withhub 46 either additional to the bearing for said hub in frame plate 19or in place thereof. Time dial 56 may be provided with a handle 59 forturning same for purposes hereinafter described.

The timing mechanism is provided with a stop lever 60 a tongue 61 ofwhich engages with a tongue 62 on trip dog 49 at a position theexactness of which can be regulated by the set screw 63 locked by thenut 64.

In the normal position of parts which is that position to which therunning of the time movement restores all parts after each setting anduse of the mechanism, the two time pointers 39 and 4'7 are at top centerposition designated by broken lines in Fig. 1 and Fig. 2 correspondingto which cam 13 and trip dog 49 are positioned as shown in Fig. 3, stoplever 60 preventing the further clockwise rotation of trip dog 49 andtherefore of pointer 47 the ear 48 of which prevents further clockwiserotation of pointer 39 and therefore of arbor 15 whereby the movement isprevented from further running down and all parts brought to rest. I donot limit myself to the particular means shown for stopping the runningof the movement or to any means whatever as it will be plain themovement could be permitted to continue running until the power inspring 25 is entirely depleted.

To set the timing mechanism for action the crank 33 is first turned tothe left or contra clockwise which, in the absence of anything to resistthem rotates time pointers 39 and 47 also contra clockwise and awayfrom'their top center or zero position. In the position of the time dialindicated in Fig. l the pointers indicate the interval of time that willelapse before their individual return to zero position as impelled bythe running of the movement and it is understood that cams 13 and 14 soco-act respectively with detents 10 and 11 that said detents aredifferently conditioned when said cams are at zero than when displacedtherefrom whereby the automatic time controlled effect is produced uponthe device, such as an electric switch or gas, valve, to be timed.

Movement spring 25 has thus been energized and immediately starts inaction retarded by the time train to rotate crank 33 clockwise at thesame speed as arbor 15 and simultaneously r0- tates pointer 39 andpointer 47 in the same clockwise direction but at a different speed fromarbor 15 owing to the gears 37, 41, 44 and 45. Upon the arrival ofpointer 47 at top center position cam 13 acts upon detent 10 to effectthe first time controlled action of the device to be timed. Thereafterpointer 47 ceases to rotate being arrested by stop lever 60 engagingtrip dog 49 but all the other rotating parts continue to' move under thepower of spring 25 with the exception of cam 13 which as it continues tobe propelled in clockwise direction in Fig. 3 through the engagement ofratchet wheel 40 with pawl 54 thrusts said pawl against the nowstationary trip dog 49 and thereby upwardly and out of engagement withthe ratchet tooth which has been propelling it whereupon the springaction of pawl 54 itself causes cam 13 to slip back until the pawl seatsitself in thenext following ratchet tooth and these short oscillationscontinue as each tooth of the ratchet wheel passes into and out ofengagement with pawl 54 until finally pointer 39 arrives back at its topcenter position whereupon it is arrested by the ear 48 on pointer 47which will act through the gears 37, 41, 44 and 45 to resist furtherrotation of arbor 15 and crank 33 and bring the movement to a stop. Thearrival of pointer 39 at its top center or zero position conditions cam14 .to act upon detent 11 so that thesecond time controlled actuation ofthe device to be timed takes place. I

In the above description it will be understood that I do not limitmyself to the cam 14 being driven through positive connection to gear 41or to ratchet wheel 40, as cam 14 might as well be loosely rotatablerelative to said ratchet wheel and gear and carry a pawl the equivalentof pawl 54 whereby cam 14 would be releasably driven by ratchet wheel 40in the same manner that cam 13 is pictured and described as propelled,in which event the arresting of the movement of pointer 39 would notarrest the running of the time movement but only cam 14, and .powerspring 25 would then continue to run down until its power becamedepleted or until some other stop became effective as might be desired.Fig. 10 shows a mechanism wherein both time cams 13' and 14' arereleasably impelled from what is in effect a common ratchet wheel 40',in which figure the winding of the movement spring 25 is designed to bedone through gears 37 and 41' by mechanism the details of which may beunderstood in greater particular from reference to my co-pendingapplication Serial No. 642,496 filed May 31, 1923 and in Fig. 10'it willbe understood that a crank equivalent to crank 33 of Figs. 1 and 2 maybe applied to rotate gear 37 and thence the winding arbor 15' whicharrangement would differ from Figs. 1 and 2 in that the crank would beeccentric with relation to the time pointers. In Fig. 11 I haveillustrated enough of the details of the construe tion disclosed in mylast mentioned co-pending application to make clear its points ofdistinction from the corresponding mechanism shown in Fig. 2.

The time dial 56 in Figs. 1 and 2 is frictionally swivelled for purposesof setting the timer to act at predetermined times of day without directreference to the intervals of time that are to elapse. For instance, ifit be nine oclock at the time of setting the timer to act upon detents10 and 11, say at four oclock and six o'clock, dial 56 is first turnedso that figure nine is at top center position, pointer 4'7 is turned tofigure four and pointer 39 is'turned to the figure six which effects theentire time setting without computation of intervals of time in order toknow what numbers on the dial the time pointers must be set against inorder to act at four and six oclock respectively. Since this is a commonuse of such a time indicating dial and since the initial positioning ofthe dial with the correct time of day at top center is an act that hasto be performed at each setting of the timer I may serve the doublepurpose of rendering unnecessary this preliminary attention to the dial.and make of same a sort of clock in that the correct time of day can atany time be told by observing the position of the dial in the fol with alarge gear 72 of same diameter as'the gear formed by toothing the edgeof dial and gear 72 may be mounted to turn rigidly with cam 14 so thatdial 56 will be rotated in unison with cam 14 through the medium of thefriction clutch represented in spring 69 and slide collar '71 permittingmanual adjustment or correction of the setting of the dial by means ofthe handle 59. Once adjusted with the correct time of day at top oropposite the zero mark 73 the rotating of the time dial will maintainthe correct time of day at the top so long as the movement runs withproperly geared, time keeping accuracy. I may accomplsh the same resultby making the digits or graduations stationary on the casing at the edgeof the time dial which could thereupon carry a rotating marker thatwould always point to the correct time of day on such stationarygraduations. In this connection see Figs. 24 to 27 inclusive of myco-pendlng application Serial No. 616,549.

In Fig. 8 I suggest a practical construction for mounting dial 56'geared for rotating as described. The eyelet 57'may be as in Fig. 2 anda shouldered collar '74 may be clamped by such eyelet rigidly againstthe housing 21, dial 56 be'ng confined and loosely rotatablebetweeneyelet 57 and the shoulder on collar 74.

Figs. 9 and 10 show a corresponding adaptation of drive gear for a timedial 56-of the type disclosed in my co-pending application, Serial No.642,496. which may have the gear '75 fixed to its rear face and drivenfrom gear 41 by the pinion '76 friction held against collar 77 onspindle '78 by spring 79 deriving its thrust from a shoulder 80 on saidspindle which latter carries at its forward end the pinion 81 in meshwith gear 75, the housing 21 being broken away at 82 to accommodate gear'75 and p'nion 81, both or either of which could if desired be entirelyinside of or outside of housing 21 to avoid the opening 82.

By reference to Fig. 11, which shows in clearer detail the constructionof the mechanism in cluding parts 13, 14, 15', 25', 37, 40', and 41, allof wh'ch together with parts 83 to inclusive may be identical with thedisclosure in my co-pending application Serial No. 642,496, it will beseen that although in the present improvements I have shown how aseparate crank or other kind of winding manual may be intro ducedadditional to time setting pointers 39, 47' and which as before said canas well be employed for turning winding gear 37 in Figs. 9 to 11inclusive, for separate winding of the movement if desired, I do notthereby necessarily sacrifice the advantage which I believe to be newwith these improvements, viz that pin 83 and flip stop 84 (see Fig. 11)prevent setting of the time pointers away from top center or zeroposition without first or simultaneously winding the movement spring 25even though a separate manual be employed for such winding. And

the permanent or zero stop 85 may still operate to establish a zeropositon or definite limit to which the spring 25 may run down, acting(as is shown for example only) through stop 86 on trip member 8'7, thuslimiting the contra-clockshaft 90 and of the before mentioned pin 83 andflip stop 84, limits the running down of spring 25' and insures thatadequate winding of this spring shall accompany or precede any turningof either pointer 39 or 47 in a clockwise direction away from zeroposition for the purpose of setting the time.

The idea of a constantly rotated dial to tell the time of day,irrespective of the settings and movement of associated pointers havingto do with the device actuating function of the timing mechanism, iswithin the scope of this invention inclusive of timing mechanism whichmay be motivated not by a spring motor, but instead, by an electricalmotor, or by any other impelling power whatever that may be utilized toproduce and measure time intervals. For instance, the form of timingmechanism shown in United States Patent No. 1,495,020 issued to ChesterI. Hall, may be geared to have its time dial impelled by running of asynchronous motor to avail of the various purposes and advantages of thepresent improvement.

It will also be clear that the expedients here disclosed are applicablein the same or equivalent forms to the timing mechanism disclosed in myco-pending application Serial No. 183,838 in which connection, as in thecase with pin 83 and flip stop 84 of Fig. 11 of the present disclosure,I may remove the pin 82, or the flip stop 83, or both of the structuredisclosed in said co-pending application so that the spring movement isfree to run until its power is depleted, and I may apply a wing handleor a crank for the purpose of crank 33, hereof, at any convenient point,such as at the forward end of gear 37' 'hereof, or of gear 56, of mysaid co-pending application, or to another gear meshing directly orindirectly with either of same, as a means of winding the movement.

It is pointed out that to retain pin 82 and the flip stop 83 (see Fig.11, parts 83 and 84) of the structure of my said co-pending application,Serial No. 183,838, filed April 14, 1927, or members equivalent theretofor preveniing the running down or playing out of the movement spring toan indeterminate point out of definite correspondence to the zeroposition of the time setting pointers, insures that the time pointersshall never be set for automatic operation in the mistaken idea that themovement spring is sufficiently wound to complete the automatic timingcycle when in reality it is depleted or run down beyond a state ofoperativeness.

In this important respect resides a very practical improvement over themany forms of timing mechanisms old in the art wherein the clock or timemovement is commonly wound by a manual operatively separate from thetime setting means and thereby requiring individual attention to theseparate functions of time setting and of winding to be sure themovement is sufiiciently wound to automatically complete the intendedcycle of operations. The function of winding cannot be accidentlyneglected in my approved arrangement of separate winding means and timesetting means which are operatively interconnected through theengagement-0f pin 83 and flip stop 84 before referred to.

Therefore, without intention of limiting this invention to any smallerscope than will cover all fair substitutes and equivalents as to uses,elements and combinations mentioned, what I claim is:

1. In timing mechanism including a time movement, in combination, awinding arbor for said movement, a timer rotatively impelled by saidmovement in co-axial relation to said arbor, but at a speed differenttherefrom.

2. In timing mechanism including a time movement, in combination, awinding arbor for said movement carrying a manual for turning same, anda timer rotatable by said movement at a speed diflerent from said manualand carrying a time indicating pointer between said manual and saidmovement.

3. In combination, a spring driven time movement, a winding arbortherefor, a timer rotatable by said movement about a common axis withsaid arbor but at a different rate of speed from said arbor, and clutchmeans rendering said timer shiftable to selective rotative settingsrelative to said arbor.

4. In combination, a spring driven time movement, a winding arbortherefor, a timer rotatable by said movement about a common axis withsaid arbor but at a different rate of speed from said arbor, and clutchmeans rendering said timer shiftable to selective rotative setlingsrelative to said arbor, together with a second timer rotatable by saidmovement also about said' common axis, and clutch means rendering saidsecond timer shiftable to selective rotative settings relative to saidarbor and to the first said timer.

5. In combination, a spring driven time movement, a winding arbortherefor, a timer rotatable by said movement about a common axis withsaid arbor but at a different rate of speed from said arbor, and clutchmeans rendering said timer shiftable to selective rotative settings relaive to said arbor, and a dial rotatable by said movement also about saidcommon axis and cooperating with said timer to measure time.

6. In combination, a spring driven time movement, a winding arbortherefor, a timer rotatable by said movement about a common axis withsaid arbor but at a different rate of speed from said arbor, and clutchmeans rendering said timer shiftable to selective rotative settingsrelative to said arbor, and a dial rotatable by said movement also aboutsaid common axis and cooperating with said timer to measure time,together with separate clutch means rendering said dial shiftable toselective rotative settings relative to said timer.

'7. In combination, a time movement, a timer rotatable to variablesettings removed from a stop determined position of rest and returnableto said position by said movement, mechanism operated by said timer asit nears its said position of rest, a time indicating dial co-operatingwith said timer to measure'time and rotatable by said movement about acommon axis with said timer.

8. In a timing mechanism including a time movement designed to bemanually energized to complete a selective cycle of automatic action, incombination with said movement, a winding manual connected to require aplurality of rotations for fully winding said movement, a settableindicator for determining said cycle of automatic action and connectedto rotate a fewer number of times than said manual as impelled by saidmovement during the said cycle of automatic action, and means, to insurethat the setting of said indicator shall be accompanied or preceded by 1sufficient winding turns of said manual to so energize said movementthat the latter will complete the cycle of automatic action representedby the setting of said indicator.

9. In timing mechanism in combination, a device to be timed, a springdriven timing movement, a winding spindle connected to energize saidmovement, a time graduated dial rotatable about the axis of said windingspindle and connected to be impelled by said timing movement at a lowerspeed than said winding spindle during the running down of saidmovement.

10. In timing mechanism in combination, a time graduated dial, timesetting indicators adjustable to different positions thereon, a timemovement connected to impel said dial and indicators, a spindle forwinding said movement concentric with said dial and extending to therear thereof, and manual means for turning said spindle in windingdirection adapted to connect to the front end of said spindle and toberotated in front of said dial for winding the movement.

11. Center wind mechanism for a time'switch embodying in combinationwith a spring driven time movement, a movement rotated timer cam, and atime graduated dial connected to be impelled by said movement and toslip relative to said cam, a winding spindle operatively connected tosaid movement at the rear of said dial, and manual means to rotate saidspindle in winding direction and supported in front of said dial to turnin concentric relation thereto.

12. Center wind mechanism for a time switch embodying in combinationwith a spring driven time movement, a movement rotated cam fordetermining the time of action of said switch, and a time graduated dialconnected to be impelled by said movement and to slip relative to saidearn, a winding spindle connected at the rear of said dial to wind saidmovement, manual means rotatable at the front of said dial in concentricrelation thereto, and an operating con: nection between said spindle andsaid manual means extending through the center of said dial.

13. In an interval timing mechanism in combination, a time settingpointer, a time movement, a spindle whereby said movement impels saidpointer, a time graduated dial supported to rotate about the axis ofsaid spindle at the rear of said pointer, separate means whereby saidmovement impels said dial, both said pointer and said dial beingadjustable to selective relative and absolute positions independently ofsaid movement.

14. In a double action interval timing mechanism in combination, twotime setting pointers concentrically rotatable, a time movement to impelsaid pointers in unison, a time graduated dial supported to rotate aboutthe same axis as said pointers at the rear thereof, separate meanswhereby said movement impels said dial, stop means to limit the travelof said pointers but arranged to permit the uninterrupted travel of saiddial, and means permitting said movement to continue its running therebyto continue the rotation of said dial when said pointers are stopped.

15. In a timing mechanism, in combination, a time setting pointer, atime movement, slippable connections whereby said movement impels saidpointer, a time graduated dial, supported to ro-' tate about the sameaxis as said pointer at therear thereof, separate connections wherebysaid movement impels said dial, and stop means arranged to limit thetravel of said pointer but arranged to permit the uninterrupted travelof said dial as impelled by said movement when said pointer is stopped.

16. In a timing mechanism, in combination, a time setting indicator, atime movement, slippable connections whereby said movement impels saidindicator, a time graduated dial connected to be impelled by saidmovement, and means to limit the travel of said indicator withoutlimiting the travel of said dial.

17. In a time-controlled device, timing mechanism, a manual means towind the timing mechanism, a second manual means to pre-determine a timesaid mechanism shall cause an actuation of said device, a third manualmeans to pre-determine a later time said mechanism shall cause asubsequent actuation of said device, and connections whereby windingmovement of the first said manual means must precede time settingmovement of the other two said manual means.

18. In a timing mechanism in combination, a device to be timed, a springdriven timing movement including a winding spindle, a timer cam topre-determine the time of action of said device and driven by positiveconnection to said spindle, a time graduated dial driven by slippableconnection to said spindle, and manual means positively connected withsaid spindle for turning the latter to wind, and mounted to rotateconcentrically with said dial.

19. In combination, a time movement, a manual means for winding saidmovement, and a time graduated dial connected to rotate about the sameaxis as said manual means, and a timer cam supported to rotate about thesame axis as said manual means and connected to be driven by saidmovement in positive relation to said manual means and in slippablerelation to said dial.

20. In an interval timing mechanism in combination, a time settingpointer, a time movement, a spindle whereby said movement impels saidpointer, a time graduated dial supported to rotate about the axis ofsaid spindle at the rear of said pointer, separate means whereby saidmovement impels said dial, said pointer being adjustable to selectiverelative and absolute positions independently of said movement.

21. In an interval timing mechanism in combination, a time settingpointer, a time movement, a spindle with slippable connections wherebysaid movement impels said pointer, a time graduated dial supported torotate about the axis of said spindle at the rear of said,

pointer, gearing comprising means separate from said spindle wherebysaid movement impels said dial, and a handle at the front of the timingmechanism for rotatively adjusting said pointer to selective relativeand absolute positions in dependently of said movement as permitted bythe said slippable connections.

22. In an interval timing mechanism in combination, a time settingpointer, a time movement, a spindle with slippable connections wherebysaid movement impels said pointer, a time graduated dial supported torotate about the axis of said spindle at the rear of said pointer,slippable gearing comprising means separate from said spindle and itssaid slippable connections whereby said movement impels said dial, bothsaid pointer and said dial being adjustable through the yielding of saidslippable connections and said slippable gearing respectively, toselective relative and absolute positions independently of saidmovement.

23. In an interval timing mechanism in combination, a time settingpointer, a time movement, a spindle with slippable connections wherebysaid movement impels said pointer, a time graduated dial supported torotate about the axis ofsaid spindle at the rear of said pointer,slippable gearing comprising means separate from said spindle and itssaid slippable connections whereby said movement impels said dial, ahandle at the front of the timing mechanism for rotatively adjustingsaid pointer, and another handle for rotatively adjusting said dial,said pointer and dial being adjustable respectively by said handles toselective relative and absolute positions independently of said movementas permitted by the said slippable connections and the said slippablegearing, respectively.

24. In an interval timing mechanism in combination, a time settingpointer, a time movement, a spindle with slippable conneztions wherebysaid movement impels said pointer, a

time graduated dial supported to rotate about the axis of said spindleat the rear of said pointer, slippable gearing comprising means separatefrom said spindle and its said slippable connections whereby saidmovement impels said dial, a handle at the front of the timingmechanism, gearing connecting said handle to said spindle for rotativelyadjusting said pointer, and another handle for rotatively adjusting saiddial, said pointer and dial being adjustable respectively by saidhandles to" selective relative and absolute positions independently ofsaid movement as permitted by the said slippable connections and thesaid slippable gearing, respectively.

RAYMOND D. SMITH.

